Vac sealers are contraindicated for bear canisters. You want things to flow together, not stack unevenly with lots of air space between. Plus those bags are expensive to use and throw away.

Dehydrators with adjustable temperature is best. You can get any model with temp knob and do well, tho it is easier to line trays with parchment paper if they're rectangular. You want one that provides good air flow between the trays.